Potty,
In the top left corner of the navigation bar is "User CP" which is the control panel. Click on that, and you'll see an area I think mid screen, which will show comments that have been made on your posts. Most people sign their comments, as there is a space to do so. It will also tell you which comment in particular was noted. You can give positive and negative reputation - it's done by clicking on the scale in the right corner of each post.
Looks like you've gotten a gold star, or a green one anyway!
tracy
PS - Whoops! Rep is built by posting in general, over time. More rep is accumulated (or taken away depending on the post) when another member clicks those scales.